This triple-row sink float separation tank offers the latest technique in separating co-mingled rigid plastics such as PET bottles and caps, PP and PS rigid plastics, and other plastic mixes.
Unlike traditional sink float separation tanks, our 2020 model uses three separate rotating screws to extend the overall processing time. This allows the plastic material to stays longer within the tank for better cleaning and separation. This compact design is similar to having three traditional washing tanks!
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Frequently Asked Questions
What does a sink-float separation tank do?
A sink-float tank separates co-mingled plastics by density: material is agitated in water so that plastics denser than water sink while lighter plastics float. This splits mixed streams — for example PET bottles from their PP caps — into cleaner, single-material fractions. It is a key purification stage in rigid plastic washing lines, improving the value of the recovered flakes.
What makes the triple-row design different?
Unlike traditional tanks, this 2020 model uses three separate rotating screws to extend the overall processing time. Material stays longer within the tank, getting better cleaning and more complete separation. The compact design delivers the effect of three traditional washing tanks in one footprint — more separation capacity without more floor space.
Which materials can it separate?
The tank handles co-mingled rigid plastics such as PET bottles and caps, PP and PS rigid plastics, and other plastic mixes. It works on shredded and granulated material, where the size reduction exposes surfaces for washing and lets density differences act cleanly. Before investing, it helps to know exactly what you are feeding in — see our guide on how to distinguish plastic PP, PE, PS, PA, ABS, and PVC.
Where does the tank fit in a recycling line?
The separation tank sits after shredding and granulating: size-reduced material enters the tank, gets washed and density-separated, then moves on to drying stages such as a centrifugal dryer. It is a standard component in both rigid plastic recycling lines and PP/PE film washing lines, wherever mixed plastics need splitting into clean fractions.
How effective is the separation?
Because the triple-row screw design keeps material in the tank longer than a traditional single-screw tank, separation and cleaning are both improved. Longer residence time means more complete sinking and floating of each fraction, and more washing action on the material. Actual purity depends on the input mix and particle size, so send us your material details for a realistic assessment.
What maintenance does the tank require?
Routine care covers the three rotating screws, the tank interior, and water quality. Screws should be checked for wear, the tank cleaned of settled sediment regularly, and wash water refreshed or filtered to keep separation sharp. The compact design keeps components accessible, and ASG supplies wear parts and technical support to minimize downtime.